Multi-gene phylogeny of the subclass Astomatia (Protista: Ciliophora) refreshed with two rare astome ciliates from the digestive tube of endogeic earthworms

Author(s):  
Tomáš Obert ◽  
Peter Vďačný
Agriculture ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 60
Author(s):  
Onja Ratsiatosika ◽  
Malalatiana Razafindrakoto ◽  
Tantely Razafimbelo ◽  
Michel Rabenarivo ◽  
Thierry Becquer ◽  
...  

The effects of earthworm inoculation and cropping systems on upland rice systems were examined over a four-year period in the Highlands of Madagascar. Each year, endogeic earthworms Pontoscolex corethrurus (Rhinodrilidae) were inoculated (EW+) at a density of 75 ind m−2 or were not inoculated (EW0). Inoculation was tested in three cropping systems: conservation agriculture (CA) and traditional tillage with or without residues restitution. Soil and plant properties were measured during the first three years while soil biological properties were assessed at the fourth year. At the end of the experiment, earthworm density was three-fold higher in EW+ than in EW0, demonstrating the success of the inoculation. Earthworm density was more important in CA than in tillage systems. Earthworm inoculation had higher significant effects on soil and plant properties than cropping systems. Earthworm inoculation had positive effects on soil macroaggregation (+43%), aboveground biomass (+27%), rice grain yield (+45%), and N grain amount (+43%). Intensifying earthworm activity in field conditions to meet the challenge of ecological transition is supported by our study.


PLoS ONE ◽  
2013 ◽  
Vol 8 (7) ◽  
pp. e68410 ◽  
Author(s):  
Chandrika Ramadugu ◽  
Bernard E. Pfeil ◽  
Manjunath L. Keremane ◽  
Richard F. Lee ◽  
Ivan J. Maureira-Butler ◽  
...  

1968 ◽  
Vol 46 (3) ◽  
pp. 321-327 ◽  
Author(s):  
M. A. Alikhan

Tbe circulatory system, lying in the mid-dorsal line of the body, consists of an oval heart, the opthalmic artery, and a dorsal abdominal artery.The digestive system comprises a wide, large alimentary tube and two pairs of digestive glands. An oesophagus, a proventriculus, midgut, and a short proctodacum or hindgut form the digestive tube. The digestive glands are very well developed and are beaded in form; each pair lies on either side of the alimentary canal.The reproductive organs are well developed in both sexes: in the male they consist of paired testes and their vas deferentia, and in the female paired bilobed ovaries and oviducts.A cerebral or supraoesophageal ganglion, a suboesophageal ganglion, and seven thoracic ganglia form the nervous system. The supraoesophageal ganglion is united with the suboesophageal ganglion by means of the circumoesophageal commissures, whereas the thoracic ganglia and suboesophageal ganglia are linked with each other by paired connectives.The gills and the tracheae are the organs of respiration. The gills are borne of the bases of the pleopods and are enclosed in the branchial chamber. The tracheae are located on the lateral lobes of the first two pleopods only.


1994 ◽  
Vol 91 (15) ◽  
pp. 7281-7285 ◽  
Author(s):  
D. W. Freshwater ◽  
S. Fredericq ◽  
B. S. Butler ◽  
M. H. Hommersand ◽  
M. W. Chase
Keyword(s):  

2011 ◽  
Vol 98 (8) ◽  
pp. 1356-1365 ◽  
Author(s):  
Eric J. Tepe ◽  
Frank T. Farruggia ◽  
Lynn Bohs

2018 ◽  
Vol 121 ◽  
pp. 139-149 ◽  
Author(s):  
Michael San Jose ◽  
Camiel Doorenweerd ◽  
Luc Leblanc ◽  
Norman Barr ◽  
Scott Geib ◽  
...  
Keyword(s):  

Author(s):  
Lorena Vieira Matos ◽  
Maria Inês Braga Oliveira ◽  
José Celso Oliveira Malta ◽  
Grazyelle Sebrenski Silva

2012 ◽  
Vol 45 (3) ◽  
pp. 395-398 ◽  
Author(s):  
Dionatas Ulisses de Oliveira Meneguetti ◽  
Olzeno Trevisan ◽  
Luís Marcelo Aranha Camargo ◽  
Renato Moreira Rosa

INTRODUCTION: This study analyzed the occurrence and the contamination of triatomines by trypanosomatids in Orbignya speciosa (babassu) specimens in the State of Rondônia, Brazil, in two different environments (pasture and woods). METHODS: Capture of triatomines on babassus and microscopic search for trypanosomatids in their digestive tube were carried out. RESULTS: Four hundred ninety-four (494) specimens were captured (Rhodnius prolixus and R.robustus), of which 35.6% of the triatomines were positive for trypanosomatids. CONCLUSIONS: The high index of natural infection along with the abundance of triatomines points out to the necessity to create an epidemiological surveillance system to monitor vector-borne transmission and deepen the studies on the ecology of such vectors in the Amazon.


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